Masonry Wall Design: Single-Wythe Moisture penetration through exterior walls is a concern on every project (or – it should be a concern on every project!). Single-wythe concrete block construction does a great job in preventing water from entering the interior of your building but there are several important “belts and suspenders” that should be included in your design to make sure your masonry wall does the best job possible.
So, what do we consider a single-wythe wall? There are three major types of masonry walls built in Florida. The very best masonry wall to prevent water passage (we call it The World’s Best Wall!!) is called a double-wythe cavity wall and contains a drainage/air space between two separate wythes or “layers” of masonry. Water that makes it through the first wythe runs down the back side of the wall and is discharged to the exterior through flashing and weeps.